ABSA 4b Questions and Answers (Top
Grade Assured) 2026 Update
In a warm air heating system the cold air return registers
are located
a) in exterior walls
b) in interior locations
c) under windows
d) in floors
e) in ceilings - Correct Answers ✅B
The major disadvantage of an electric resistance coil furnace
for warm air heating is
a) the high cost of electricity
b) the danger from electric shock
c) the high cost of maintenance
d) the large size of the furnace
e) the location of electrical wiring - Correct Answers ✅A
Lowboy furnaces are just over
a) 1.0 m in height
b) 0.8 m in height
c) 1.4 m in height
d) 1.6 m in height
e) 1.2 m in height - Correct Answers ✅E
,ABSA 4b Questions and Answers (Top
Grade Assured) 2026 Update
The advantage of having duct furnaces instead of a large
central furnace is
a) less initial cost
b) easier installation
c) better control of heat in each zone of the building
d) that they require less space
e) lower maintenance costs - Correct Answers ✅C
The power supply for an electric resistance coil furnace is
a) 60 V
b) 120 V
c) 240 V
d) 220 V
e) 480 V - Correct Answers ✅C
In a fin-coil heat exchanger the primary source of heat for
the exchanger is
a) steam or hot water
b) gas
c) oil
d) solar
e) radiant - Correct Answers ✅A
,ABSA 4b Questions and Answers (Top
Grade Assured) 2026 Update
A type of directly fired space heater is
a) a unit heater
b) a floor furnace
c) a wall furnace
d) all of the above
e) none of the above - Correct Answers ✅D
High efficiency furnaces and heaters range in annual fuel
utilization efficiency (AFUE) from
a) 94 - 98%
b) 80 - 95%
c) 70 - 75%
d) 60 - 70%
e) 50 - 60% - Correct Answers ✅B
In high efficiency furnaces if the temperature of the flue
gas drops below 65 degrees C the
a) flue gas will condense
b) water vapour will condense
c) furnace burner will shut down
d) furnace burner will start up
e) furnace vent will close - Correct Answers ✅B
, ABSA 4b Questions and Answers (Top
Grade Assured) 2026 Update
In a pulse combination furnace the stated efficiency is
a) 94 - 98%
b) 80 - 95%
c) 70 - 75%
d) 60 - 70%
e) 50 - 60%
Warm Air Furnace Components and Maintenance - Correct
Answers ✅A
Heat exchangers in gas fired furnaces are made of
a) brass
b) copper
c) aluminum
d) steel
e) cast iron - Correct Answers ✅D
Air filters can be divided into two groups
a) mechanical and rotating drum
b) electronic and steam
c) dry and wet
d) steam and rotating drum
e) mechanical and electronic - Correct Answers ✅E
Grade Assured) 2026 Update
In a warm air heating system the cold air return registers
are located
a) in exterior walls
b) in interior locations
c) under windows
d) in floors
e) in ceilings - Correct Answers ✅B
The major disadvantage of an electric resistance coil furnace
for warm air heating is
a) the high cost of electricity
b) the danger from electric shock
c) the high cost of maintenance
d) the large size of the furnace
e) the location of electrical wiring - Correct Answers ✅A
Lowboy furnaces are just over
a) 1.0 m in height
b) 0.8 m in height
c) 1.4 m in height
d) 1.6 m in height
e) 1.2 m in height - Correct Answers ✅E
,ABSA 4b Questions and Answers (Top
Grade Assured) 2026 Update
The advantage of having duct furnaces instead of a large
central furnace is
a) less initial cost
b) easier installation
c) better control of heat in each zone of the building
d) that they require less space
e) lower maintenance costs - Correct Answers ✅C
The power supply for an electric resistance coil furnace is
a) 60 V
b) 120 V
c) 240 V
d) 220 V
e) 480 V - Correct Answers ✅C
In a fin-coil heat exchanger the primary source of heat for
the exchanger is
a) steam or hot water
b) gas
c) oil
d) solar
e) radiant - Correct Answers ✅A
,ABSA 4b Questions and Answers (Top
Grade Assured) 2026 Update
A type of directly fired space heater is
a) a unit heater
b) a floor furnace
c) a wall furnace
d) all of the above
e) none of the above - Correct Answers ✅D
High efficiency furnaces and heaters range in annual fuel
utilization efficiency (AFUE) from
a) 94 - 98%
b) 80 - 95%
c) 70 - 75%
d) 60 - 70%
e) 50 - 60% - Correct Answers ✅B
In high efficiency furnaces if the temperature of the flue
gas drops below 65 degrees C the
a) flue gas will condense
b) water vapour will condense
c) furnace burner will shut down
d) furnace burner will start up
e) furnace vent will close - Correct Answers ✅B
, ABSA 4b Questions and Answers (Top
Grade Assured) 2026 Update
In a pulse combination furnace the stated efficiency is
a) 94 - 98%
b) 80 - 95%
c) 70 - 75%
d) 60 - 70%
e) 50 - 60%
Warm Air Furnace Components and Maintenance - Correct
Answers ✅A
Heat exchangers in gas fired furnaces are made of
a) brass
b) copper
c) aluminum
d) steel
e) cast iron - Correct Answers ✅D
Air filters can be divided into two groups
a) mechanical and rotating drum
b) electronic and steam
c) dry and wet
d) steam and rotating drum
e) mechanical and electronic - Correct Answers ✅E
